| 摘要 |
An electrical motor device (1) that is provided with: a rotating electrical machine (4) that has three-phase windings (7U-7W); a switch (S) that turns application of voltage to the windings (7U-7W) on and off; a control means (6) that gives instructions to the switch (S) and controls the action of the rotating electrical machine (4); and a rotational speed detection means (12) that detects the rotational speed of an internal combustion engine (3). The control means (6) has a three-phase mode that applies voltage to the three-phase windings (7U-7W) in three states sequentially and a two-phase mode that alternates between two states selected from among the three states. The control means (6) has a first threshold value (C0) for the rotational speed of the internal combustion engine (3) and uses the two-phase mode when the value detected by the rotational speed detection means (12) is greater than the first threshold value (C0). |
